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Ilpo Järvinen 867cae44f8 mfd: intel-m10-bmc: Manage access to MAX 10 fw handshake registers 
On some MAX 10 cards, the BMC firmware is not available to service
handshake registers during secure update erase and write phases at
normal speeds. This problem affects at least hwmon driver. When the MAX
10 hwmon driver tries to read the sensor values during a secure update,
the reads are slowed down (e.g., reading all D5005 sensors takes ~24s
which is magnitudes worse than the normal <0.02s).

Manage access to the handshake registers using a rw semaphore and a FW
state variable to prevent accesses during those secure update phases
and return -EBUSY instead.

If handshake_sys_reg_nranges == 0, don't update bwcfw_state as it is not
used. This avoids the locking cost.

Co-developed-by: Russ Weight <russell.h.weight@intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Co-developed-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230417092653.16487-5-ilpo.jarvinen@linux.intel.com
2023-06-15 09:19:36 +01:00
..
altera-cvp.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
altera-fpga2sdram.c
fpga: bridge: Use standard dev_release for class driver
2021-11-28 14:02:13 -08:00
altera-freeze-bridge.c
fpga: bridge: Use standard dev_release for class driver
2021-11-28 14:02:13 -08:00
altera-hps2fpga.c
fpga: bridge: Use standard dev_release for class driver
2021-11-28 14:02:13 -08:00
altera-pr-ip-core-plat.c
fpga: fpga-mgr: altera-pr-ip: Simplify registration
2020-12-01 18:49:32 +01:00
altera-pr-ip-core.c
fpga: altera-pr-ip: fix unsigned comparison with less than zero
2022-06-10 15:48:23 +08:00
altera-ps-spi.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
dfl-afu-dma-region.c
fpga: dfl: afu: convert get_user_pages() --> pin_user_pages()
2020-06-18 18:12:06 -07:00
dfl-afu-error.c
fpga: dfl: afu: harden port enable logic
2021-03-24 11:15:04 -07:00
dfl-afu-main.c
fpga: dfl: afu: harden port enable logic
2021-03-24 11:15:04 -07:00
dfl-afu-region.c
fpga: dfl: more kernel-doc corrections
2023-01-28 23:33:43 +08:00
dfl-afu.h
fpga: dfl: more kernel-doc corrections
2023-01-28 23:33:43 +08:00
dfl-fme-br.c
fpga: bridge: Use standard dev_release for class driver
2021-11-28 14:02:13 -08:00
dfl-fme-error.c
fpga: dfl: fme: add interrupt support for global error reporting
2020-07-06 21:35:42 -07:00
dfl-fme-main.c
fpga: dfl: fme: add interrupt support for global error reporting
2020-07-06 21:35:42 -07:00
dfl-fme-mgr.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
dfl-fme-perf.c
fpga: dfl: more kernel-doc corrections
2023-01-28 23:33:43 +08:00
dfl-fme-pr.c
fpga: dfl: kernel-doc corrections
2023-01-28 23:33:05 +08:00
dfl-fme-pr.h
fpga: dfl: more kernel-doc corrections
2023-01-28 23:33:43 +08:00
dfl-fme-region.c
fpga: region: Use standard dev_release for class driver
2021-11-28 14:02:41 -08:00
dfl-fme.h
fpga: dfl: fme: add performance reporting support
2020-04-28 15:49:28 +02:00
dfl-n3000-nios.c
fpga: fix spelling mistakes
2021-07-21 19:54:21 -07:00
dfl-pci.c
fpga: dfl-pci: Drop redundant pci_enable_pcie_error_reporting()
2023-03-10 16:39:44 +08:00
dfl.c
Driver core changes for 6.3-rc1
2023-02-24 12:58:55 -08:00
dfl.h
Char/Misc and other driver subsystem changes for 6.3-rc1
2023-02-24 12:47:33 -08:00
fpga-bridge.c
Char/Misc drivers for 6.4-rc1
2023-04-27 12:07:50 -07:00
fpga-mgr.c
driver core: class: remove module * from class_create()
2023-03-17 15:16:33 +01:00
fpga-region.c
driver core: class: remove module * from class_create()
2023-03-17 15:16:33 +01:00
ice40-spi.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
intel-m10-bmc-sec-update.c
mfd: intel-m10-bmc: Manage access to MAX 10 fw handshake registers
2023-06-15 09:19:36 +01:00
Kconfig
mfd: intel-m10-bmc: Split into core and spi specific parts
2023-01-27 10:35:00 +00:00
lattice-sysconfig-spi.c
fpga: lattice-sysconfig-spi: Add explicit include for of.h
2023-04-06 20:36:27 +02:00
lattice-sysconfig.c
fpga: lattice-sysconfig-spi: add Lattice sysCONFIG FPGA manager
2022-10-25 14:44:03 +08:00
lattice-sysconfig.h
fpga: lattice-sysconfig-spi: add Lattice sysCONFIG FPGA manager
2022-10-25 14:44:03 +08:00
machxo2-spi.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
Makefile
fpga: lattice-sysconfig-spi: add Lattice sysCONFIG FPGA manager
2022-10-25 14:44:03 +08:00
microchip-spi.c
fpga: microchip-spi: separate data frame write routine
2023-01-28 23:20:35 +08:00
of-fpga-region.c
fpga: fpga-region: fix kernel-doc formatting issues
2022-05-10 16:05:00 +08:00
socfpga-a10.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
socfpga.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
stratix10-soc.c
fpga: stratix10-soc: Fix return value check in s10_ops_write_init()
2022-12-30 10:38:29 +08:00
ts73xx-fpga.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
versal-fpga.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
xilinx-pr-decoupler.c
fpga: xilinx-pr-decoupler: Use readl wrapper instead of pure readl
2023-03-25 15:35:12 +08:00
xilinx-spi.c
fpga: mgr: Use standard dev_release for class driver
2021-11-28 13:59:13 -08:00
zynq-fpga.c
fpga: zynq: Switch to use dev_err_probe() helper
2022-10-25 14:25:02 +08:00
zynqmp-fpga.c
fpga: zynqmp-fpga: Adds status interface
2023-03-09 17:33:19 +01:00